James reynolds



N. PETERS, PHOTO LITHOGRAFHEH UNITED sTaTEs PATENT oEEoE.

JAMES REYNOLDS, OF NEW YORK, N. Y.

MAND-REL FOR MAKING GUTTA-PERCI-IA TUBING.

Specification of Letters Patent No. 15,086, dated June 10, 1856.

To all 'wh-0m t may concern Be it known that I, JAMES REYNOLDS, of thecity, county, and State of New York, have invented a new and ImprovedDrawing Apparatus for Drawing and Equalizing the Size and Thickness ofGutta-Percha Tubing; and I do hereby declare that the following is afull, clear, and exact description of the same, reference being had tothe accompanying drawing, forming part of this specification, in which-Figure l, is a vertical central section of the apparatus. Fig. 2, is alongitudinal view ofthe mandrel upon which the drawing is performed andthe connecting rod thereof.

Similar letters of reference indicate corresponding parts in bothfigures.

This invention consists in certain means of providing for the convenientand speedy introduction of the mandrel to a long piece of tubing and theready introduction of the tubing to the machine.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

C, is a standard to which is tted the stationary die D, D. This die isof circular form in its transverse section, and its sides, in a sectiontaken in a plane passing through its axis, are of rounded form, as shownin Fig. l, its middle or smallest part being of the size to which theexterior of the tube is to be drawn. It is divided in a horizont-alplane passing through its axis into two parts D, D', the upper part ofwhich, D', is made movable to enable the tube to be inserted, and whenin operation this movable part is held down by a screw E, working in afemale screw in the top of the standard C.

F, is the bulb headed mandrel the largest portion of which is of thesize to which the interior of the tube is to be drawn, but this portionconsists merely of a narrow [zone from the back of which the mandrel isrounded 0E and from the front of which it is tapered off to a shank, f.This shank is formed with an eye, 71 to connect the mandrel with thehooked end, g, of a long rod of iron G, which is considerably smallerthan the mandrel and must be of a length equal to that of the tube whendrawn. This rod, G, is intended to be screwed at the end farthest fromthe mandrel and furnished with nuts b, b, to secure it to a ixed standZ, or some fixture attached to the floor, and

as the rod will be generally of a very great length, the rollers H, ofwhich one is shown in Fig. l are placed in stands or bearings I, atsuitable intervals apart to support it. The rod is so adjusted by itsnuts b, b, that when the mandrel is attached, its largest part will beexactly within the smallest part of the die, which makes the entrance tothe space between the mandrel and die, tapering both ways.

The operation of the apparatus is conducted in the following manner.Before commencing, the mandrel is unhooked from the connecting rod G,which remains permanently secured at the opposite end and rests upon therollers H; and the die is opened by raising the screw E. The tube to beoperated upon is in the state in which it has been cast. Its exterior isa little larger than the interior of the die, and its interior a littlesmaller than the exterior of the mandrel. One end of it is passed overthe free extremity g, of the rod Gr, and the whole length of tube isthreaded over the rod, which is easily done by simply pushing it forwardby hand toward the iixed end. When the tube has been all threaded on tothe rod leaving the hook y, protruding through it, the mandrel is placedin the die and hooked on to the rod and the tube is drawn back by handover the mandrel far enough for its end to protrude far enough throughthe die to attach it to some suitable purchase which will generally be apair of rollers which constitute part of an invention of mine forfinishing the tubing. The top part of the die is then screwed down toits place and the power applied to draw the tube (which is shown insection in Fig. l, in red color) in the direction of the arrow. Indrawing the tube, the mandrel serves as a support to the materialagainst the action of the die, and the die as a support against theaction of the mandrel, which causes the material to be compressed andcondensed in the operation. The mandrel will always lind its place inthe center of the die, so that the tube will be of equal thickness, andthe tube will be reduced to the required size and to a perfectcylindrical form both externally and internally.

The bulb shape of the mandrel, the rounded form of the die, shown inFig. l, and the position of the mandrel in the middle of a rounded die,are all found by experiment to be of great importance to the success ofthe drawing process and in the combination of these conditions theapparatus diiers from all other tube drawing apparatus known to me, andI believe this to be the first apparatus ever constructed to draw guttapercha tubing internally and externally. The construction of the mandrelwith a short shank to attach it to and detach it from a rod long enoughto pass through the whole length of the tube and small enough to allowthe tube to be threaded over it when the mandrel is detached7 said rodbeing iXed at one end, is another condition very essential to theconvenient operation of the machine,

S. H. WALES,

JAS. F. BUCKLY.

